NCT Regulatory Compliance & Legal Framework 3 — Questions and Answers
Question 1: Under ASHRAE Standard 62.1, what is the term for the practice of increasing outdoor air supply rates beyond the minimum required to dilute indoor contaminants?
- Demand-controlled ventilation
- Economizer mode operation
- Ventilation rate procedure
- Indoor air quality procedure (Correct answer)
Correct answer: Indoor air quality procedure
The Indoor Air Quality Procedure (IAQP) in ASHRAE 62.1 allows designers to use contaminant concentration targets instead of prescriptive airflow rates, enabling alternative approaches to dilution.
Question 2: Which document provides the legally binding minimum efficiency requirements for filters used in California's Title 24 energy-compliant HVAC systems?
- ASHRAE 52.2 alone
- California Code of Regulations Title 24 Part 6 (Correct answer)
- CARB airborne toxic control measures
- NFPA 90A
Correct answer: California Code of Regulations Title 24 Part 6
California's Title 24 Part 6 (Building Energy Efficiency Standards) sets mandatory filter efficiency requirements for HVAC systems in the state.
Question 3: A pharmaceutical company's cleanroom must meet ISO 14644-1 Class 5 requirements. What is this standard primarily classified as in the U.S. regulatory hierarchy?
- Federal regulation enforced by the FDA
- International voluntary consensus standard adopted by many industries (Correct answer)
- Mandatory OSHA industrial hygiene code
- EPA stationary source emission limit
Correct answer: International voluntary consensus standard adopted by many industries
ISO 14644-1 is a voluntary international standard; however, the FDA references it in guidance documents, making it de facto required for pharmaceutical cleanrooms.
Question 4: Under the Safe Drinking Water Act, surface water treatment rules indirectly affect which type of air filtration technology used at water treatment plants?
- Electrostatic precipitators for lime dust control
- Carbon adsorbers for chlorine gas scrubbing (Correct answer)
- HEPA filters in laboratory hoods
- Bag filters for iron oxide removal
Correct answer: Carbon adsorbers for chlorine gas scrubbing
Carbon adsorbers and scrubbers control chlorine and other chemical vapors at water treatment plants operating under Safe Drinking Water Act permits.
Question 5: What distinguishes a Permissible Exposure Limit (PEL) from a Threshold Limit Value (TLV) in the context of airborne contaminant regulations?
- PELs are OSHA-enforceable federal standards; TLVs are ACGIH recommendations (Correct answer)
- TLVs are legally binding; PELs are voluntary guidelines
- PELs apply only to outdoor air; TLVs apply to indoor air
- Both are equally enforceable under the Clean Air Act
Correct answer: PELs are OSHA-enforceable federal standards; TLVs are ACGIH recommendations
PELs are mandatory OSHA standards with legal enforcement authority, while TLVs are published by ACGIH as professional recommendations without direct legal force.
Question 6: A contractor is hired to replace filters in an asbestos-containing building's HVAC system. Which regulation primarily governs the safe work practices required?
- NFPA 90A fire safety standards
- OSHA 29 CFR 1926.1101 Asbestos Standard (Correct answer)
- EPA NESHAP Subpart A general provisions
- ASHRAE 62.1 ventilation requirements
Correct answer: OSHA 29 CFR 1926.1101 Asbestos Standard
OSHA's 29 CFR 1926.1101 sets mandatory asbestos work practices, training, and exposure control requirements for construction and maintenance activities.
Question 7: Which type of regulatory instrument allows a facility to operate with site-specific emission limits that differ from standard NESHAP requirements?
- Variance
- Voluntary emissions reduction agreement
- Title V operating permit with alternative compliance path (Correct answer)
- Consent decree modification
Correct answer: Title V operating permit with alternative compliance path
A Title V operating permit can incorporate alternative compliance demonstrations for major sources, allowing site-specific limits where generic standards are not practicable.
NCT Regulatory Compliance & Legal Framework 3
Under ASHRAE Standard 62.1, what is the term for the practice of increasing outdoor air supply rates beyond the minimum required to dilute indoor contaminants?